My Hero Academia bakudeku ish but kinda Steven Universe. I was listening to It's Over Isn't It and just kept thinking of Katsuki during/after 431. So an AU where Izuku and Ochako have a kid together, Izuku dies at some point (you decide how) and Katsuki now takes it as his responsibility to train the kid to make them a hero like their father. Katsuki would obviously be Pearl, singing It's Over Isn't It, saying lines like "Why won't you just let me do this for you, Izuku?!" To Izuku's and Ochako's kid. "When you live for someone you're prepared to die" telling that to whoever the kids love interest is. "Izuku made me feel like I was everything..." Finally admitting stuff like that.
Ochako: Look, if I were you I'd hate me too
O: But I knew how you felt about Izuku and I stayed anyway
K: That wasn't the problem
K: He fell in love with you...
(Btw I don't actually know that much about Steven Universe to make this a whole AU, but if someone does this please tell me! Fanfics, drawings, etc, I wanna see it! I might try to do fanart whenever I get time)